List which observations were qualitative and which were quantitative. quantitative data is something that can be measured such as; the candle is 3 inches tall and has a diameter of 2 inches. qualitative data is sensory observations such as; odor, cold, hot, taste, texture, and appearance.

Quantitative= The candle is 3 inches tall and has a diameter of 2 inches.

Qualitative=  odor, cold, hot, taste, texture, and appearance

Explanation:

Qualitative:

Qualitative properties are those that can be only observed but not measured in numerical values. These are observed through senses: touch, sight, smell, taste and hear.

For example:

Color, odor, brittleness, taste etc.

Quantitative:

Quantitative properties can be measured in numerical values.

For example:

Melting point, boiling point, conductivity, viscosity, density, hardness and solubility.

In short we can say that qualitative is a measure of quality while the quantitative is a measure of quantity.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

the answer is c.the valence of the atoms combine .